Polyimides. Part I. Modern synthesis directions
Polimery 1994, No 11-12, 641
Reported and Authors' original routes to polyimides (PI) have been reviewed, viz., classical syntheses with particular reference to one-and two-stage polycondensation of tetracarboxylic acids and their derivatives (mainlydian hydrides) with diamines. New and prospective routes to PI, e.g., polycondensation of dianhydrides with diisocyanates, imide exchange and Diels-Alder reactions, have been focussed on. New monomers are described, enabling PI with special properties to be prepared, even by conventional methods. A broad division of PI into condensation and addition (thermosetting) PI has been taken into account. Routes to the so-called condensation copolyimides, e.g., poly(ester imides), poly(amide imides), poly(ether imides) and poly(urethane imides), have been described. In the addition group, PI with maleimide, nadic acid imide, acetylene and benzocyclobutene end groups are described.
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